head to head
Star Wars: Squadrons asks more than iRacing, and the gap is reads.

Execution · Practiced Mastery
Hardcore online racing sim with PvP wheel duels.

Execution · Grand Arena
Team-based 5v5 Star Wars starfighter combat with cockpit power management.
iRacing leans Execution (Practiced Mastery); Star Wars: Squadrons leans Execution (Grand Arena).
iRacing leans a little harder on execution, though the gap is small.
iRacing
Brutally precise wheel inputs required
Star Wars: Squadrons
Drifting, aim, and throttle tricks decide dogfights
Star Wars: Squadrons leans clearly harder on reads.
iRacing
Serious wheel-to-wheel racing vs humans
Star Wars: Squadrons
Human pilots in 5v5 bait, juke, and counter-adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
iRacing
Weather, tire wear, mechanical variance
Star Wars: Squadrons
Full information maps; little randomness
iRacing leans a little harder on optimization, though the gap is small.
iRacing
Setup, strategy, iRating progression
Star Wars: Squadrons
Power management and loadout meta are solvable layers
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.